Shell script for dynamically generate command

Question

Below is a sample code:

arg[1]="shell"
arg_value[1]=10
agr[2]="script"
agr_value[2]=50

command skbit ${agr[1]}="${arg_value[1]}" ${agr[2]}="${arg_value[2]}"

skbit is a script that accepts arguments in above format.

Now if there are multiple arguments that depends on the run time. How to create above command dynamically.

I tried with,

command skbit $str

where str= ${agr[1]}="${arg_value[1]}" ${agr[2]}="${arg_value[2]}" and so on.

this structure is not working for command for multiple reason.

I want a code of below structure:

command skbit {A code which will generate arguments dynamically}

Why agr and arg? Why arg_value and agr_value?

Mark Setchell
– Mark Setchell

2019-01-07 12:21:23 +00:00
Commented Jan 7, 2019 at 12:21 — Mark Setchell
– Mark Setchell, Commented Jan 7, 2019 at 12:21
BashFAQ #50 is a good place to start.

Charles Duffy
– Charles Duffy

2019-01-07 14:36:47 +00:00
Commented Jan 7, 2019 at 14:36 — Charles Duffy
– Charles Duffy, Commented Jan 7, 2019 at 14:36

that other guy · Accepted Answer · 2019-01-08 00:26:19Z

1

Are you maybe looking for something like this:

# define some arguments and values
arg[1]=shell
arg_value[1]=10
arg[2]=script
arg_value[2]=50

# joins the arguments and its values
for i in "${!arg[@]}"; do
  args+=( "${arg[i]}=${arg_value[i]}" )
done

# calls the command with the joined arguments
command skbit "${args[@]}"

You might also use associative array instead:

#!/bin/bash
declare -A arg

arg[shell]=10
arg[script]=50

for i in "${!arg[@]}"; do
  args+=( "$i=${arg[$i]}" )
done

command skbit "${args[@]}"

edited Jan 8, 2019 at 0:26

that other guy

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answered Jan 7, 2019 at 14:29

mickp

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